Relationships between resting blood flow and the indices of muscle damage after eccentric contractions
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ORIGINAL ARTICLE
Relationships between resting blood flow and the indices of muscle damage after eccentric contractions Hisashi Maeda1 · Mitsuru Saito2 · Koji Ishida1,3 · Hiroshi Akima3,4 Received: 24 November 2019 / Accepted: 16 July 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Purpose The aim of the study is to examine the relationships between increments in resting blood flow and isometric maximal voluntary contraction (MVC) force reduction, muscle soreness, and swelling after eccentric contractions (ECs). Methods Twenty-one young healthy men (age 20.8 ± 1.6 years; height 172.0 ± 5.3 cm; weight 64.9 ± 7.7 kg) were recruited for this study. All participants performed right arm ECs in five sets of 20 repetitions with 3 min of rest between the sets. The dumbbell weight corresponded to 60% MVC force of isometric contraction of elbow flexors with 90° elbow joint angle. Resting forearm blood flow (FBF), the MVC force, the muscle thickness (MT), and muscle soreness of elbow flexors, heart rate (HR), and blood pressure (BP) of brachial artery were measured before, 24 and 48 h after ECs. Results Average and peak resting FBF after ECs significantly changed from the average values before ECs (21% and 39% increase, respectively, P
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